Patent US4739971A successfully refreshed from Google Patents.
US4739971A
Expired / Lapsed
US
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Guard rail assembly
Assignee: Individual
•
Filing: 1987-03-05
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Granted: 1988-04-26
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Expires: 2007-03-05
Abstract
Abstract A guard rail assembly for a highway. A sliding frame is mounted on each of a series of posts. The sliding frame slides transversely of the guard rail assembly. Elongated guard rail units span adjacent posts. Each guard rail unit includes an elongated support plate, hanger means on the sliding frames of the adjacent posts for supporting opposed end portions of the support plates, a sliding plate mounted on the support plate for frictional engagement therewith, and shock absorber means on each of the sliding frames for resisting movement thereof transversely of the guard rail assembly. The sliding plate can be engaged by a vehicle leaving the highway. The vehicle is restrained by the sliding plate and by resistance of the shock absorber means.
Inventors
- 👤 George W. Ruane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/04; E01F15/0407; E01F15/0438; E01F15/0453
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
A guard rail assembly for a highway which comprises a line of upright posts mounted adjacent an edge of the highway, a sliding frame mounted on each of the posts for sliding transversely of the guard rail assembly, elongated guard rail units spanning adjacent posts, each guard rail assembly unit including an elongated support plate, hanger means on the sliding frames of the adjacent post for supporting opposed end portions of the support plate, a sliding plate mounted on the support plate for frictional engagement therewith, shock absorber means on each of the sliding frames for resisting movement thereof transversely of the guard rail assembly, the sliding plate being engageable by a vehicle leaving the highway, the vehicle being restrained by the sliding plate and by resistance of the shock absorber means, and track members carried by the sliding plate along upper and lower edges, the track members being guided by the support plate, the sliding plate being arranged to slide off an end of the support plate as the vehicle advances to another guard rail assembly.
Claim 2
Dependent Claim
177 words
A guard rail assembly for a highway which comprises a line of upright posts mounted adjacent an edge of the highway, a sliding frame mounted on each of the posts for sliding transversely of the guard rail assembly, elongated guard rail units spanning adjacent posts, each guard rail assembly unit including an elongated support plate, hanger means on the sliding frames of the adjacent post for supporting opposed end portions of the support plate, a sliding plate mounted on the support plate for frictional engagement therewith, shock absorber means on each of the sliding frames for resisting movement thereof transversely of the guard rail assembly, the sliding plate being engageable by a vehicle leaving the highway, the vehicle being restrained by the sliding plate and by resistance of the shock absorber means, and track members carried by the sliding plate along upper and lower edges, the track members being guided by the support plate, the sliding plate being arranged to slide off an end of the support plate as the vehicle advances to another guard rail assembly.
Claim 3
Dependent Claim
147 words
A guard rail assembly for a highway which comprises a line of upright posts mounted adjacent an edge of the highway, elongated guard rail units spanning adjacent posts, each guard rail assembly unit including an elongated support plate, hanger means on the adjacent post for supporting opposed end portions of the support plate, a sliding plate mounted on the support plate for frictional engagement therewith and for movement lengthwise thereof, the sliding plate being engageable by a vehicle leaving the highway, the vehicle being restrained by the sliding plate, and track members carried by the vehicle being restrained by the sliding plate, and track members carried by the sliding plate along upper and lower edges, the track members being guided by the support plate, the sliding plate being arranged to slide off an end of the support plate as the vehicle advances to another guard rail assembly.
Claim 4
Dependent Claim
147 words
A guard rail assembly for a highway which comprises a line of upright posts mounted adjacent an edge of the highway, elongated guard rail units spanning adjacent posts, each guard rail assembly unit including an elongated support plate, hanger means on the adjacent post for supporting opposed end portions of the support plate, a sliding plate mounted on the support plate for frictional engagement therewith and for movement lengthwise thereof, the sliding plate being engageable by a vehicle leaving the highway, the vehicle being restrained by the sliding plate, and track members carried by the vehicle being restrained by the sliding plate, and track members carried by the sliding plate along upper and lower edges, the track members being guided by the support plate, the sliding plate being arranged to slide off an end of the support plate as the vehicle advances to another guard rail assembly.
References Cited (Backward Citations)
US1449518A
Cited
US1847025A
Cited
US3084517A
Cited
FR1522918A
Cited
DE2148219A1
Cited
US4330106A
Cited
US4662611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |